We found this sophisticated meter circuit in an article in Radio Electronics magazine from June 1959. The article taught how to assemble it. Transistors are common types at the time.
This well-known configuration of the guitar effects pedal was obtained in an English magazine from...
This circuit was obtained in the National Semiconductor Linear Applications Handbook of 1994. The...
For -48 V voltages, this fast sensor was found in a 2005 Linear Technology application manual. The...